I also have been contacted by that person offerings upgrade... But I did not take it.... I also have not been a leader to finish building the printer as the direction don't match the parts.... Can anyone tell .e how to build the exfruder, given the following pictures? I think I am missing a part to hold remodel onto the motor...again ... Please see the pictures... I have taken a picture of theby GaryV - Prusa i3 and variants